My commute is 30 miles each way, I started in April this year and ride in one day, home the next, taking the bus in between. I've done it both ways 9 times, the most important thing I've found (other than making sure I have clothes at work) is staying hydrated-found out the hard way. Timing-wise, my bus commute is 1 hour, my bike commute is 1:45, but a lot more fun. And I'm 57.